CN101309207A

CN101309207A - Communication proxy method, apparatus and system

Info

Publication number: CN101309207A
Application number: CNA2007101968109A
Authority: CN
Inventors: 郑若滨
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2007-05-15
Filing date: 2007-05-15
Publication date: 2008-11-19

Abstract

Disclosed is a method, a device and a system of communication proxy for processing the conversion of the physical port and the logical port towards the received physical port information or the logical port information according to the acquired preset mapping information between the physical port and the logical port after the message interacted between the operator device and the access device is received so that the physical port between the operator device and the access device is separated; thereby, not only the changing of the physical port is ensured to have no influence on the process of operation development of the operator device, but also the safety of each physical port of the access device is ensured.

Description

Method, device and system for communication proxy

Technical Field

The invention relates to the technical field of communication, in particular to a scheme for realizing communication between multi-operator equipment and access equipment

Background

In the access network, in order to effectively support a new service, a corresponding control function needs to be added to the device in the access network, so that the operation support device can control the device in the corresponding access network, thereby realizing support of the new service.

In the access network, there may often be a large number of devices that need to be controlled by the operation support device, such as a large number of ANs (access nodes), and therefore, in order to reduce the control burden of the operation support device on the devices accessing the network, L2CP (layer two control protocol) is adopted in the network, and the devices in the access network, such as the ANs, are controlled through a BRAS (broadband access server).

Taking the application of L2CP in a DSL (digital subscriber line) system as an example, as shown in fig. 1, a DSL physical port of a DSLAM (digital subscriber line access multiplexer) in the DSL system performs physical port partition according to an SP (service provider), and an ISP (internet service provider) is taken as an example in fig. 1, and the ISP directly controls the DSL physical port of the corresponding DSL physical port partition through L2 CP.

In order to reduce interactive L2C (layer two control) message traffic in the network, AN L2CP proxy is also introduced into the network, that is, AN IWF (Interworking Function) in fig. 1 is located in AN ethernet switch and a BRAS, and the IWF can filter, detect and forward AN L2C message according to AN ISP or AN, and specifically includes: receiving a message sent by AN ISP (Internet service provider), determining AN AN (access network) corresponding to the message according to the ISP sending the message, and forwarding the received message to the AN; and receiving the message sent by the AN, determining the ISN corresponding to the message according to the AN sending the message, and forwarding the received message to the ISP. Therefore, the IWF needs to store the corresponding relationship between the ISP and the AN, and meanwhile, the AN and the ISP need to maintain the information of the opposite end respectively, for example, the ISP needs to maintain the physical port information of the AN, so that it can transmit the information to the corresponding AN.

In the process of implementing the invention, the inventor finds that the prior art has at least the following problems:

(1) poor expandability

When the DSLAM is upgraded or other maintenance is performed, it is necessary to ensure that the physical port does not change, otherwise, the ISP cannot control the corresponding physical port, and if it is to be ensured that the physical port is controlled, the ISP must be reconfigured again, thereby increasing the difficulty in expanding the DSLAM; meanwhile, impact and cost in the aspect of operation are brought between the coordinated network operator and the ISP;

(2) has potential safety hazard

The ISP directly controls the DSL physical port of the DSLAM device of the network operator through L2CP, and the network operator will have to directly expose its network deployment to competitors, which is a security risk;

(3) physical port maintenance is inconvenient

An ISP may lease lines from a plurality of network operators, each network operator having an identification method of its own physical line, and it is difficult for the ISP to manage the lines leased from different network operators in a uniform manner;

(4) physical port lookup difficulties

Because the arrangement of the physical ports has no fixed rule, the physical port identifiers are difficult to organize into continuous arrangement, so that the physical port searching is difficult; if a high-level search algorithm is adopted, a large amount of storage space must be consumed, and the truly effective data only occupies a sporadic small part of the storage space; meanwhile, in order to improve the storage efficiency, only valid data must be stored, and at this time, the physical port lookup must adopt a one-by-one comparison mode, which results in a decrease in the lookup efficiency.

Disclosure of Invention

The embodiment of the invention provides a communication agent method, a device and a system, which are used for improving the expandability and the safety of access equipment in the communication process of multi-operator equipment and the access equipment.

The embodiment of the invention provides a communication proxy method, which comprises the steps that a physical access port is arranged in access equipment, operator equipment communicates with the access equipment through a logic access port, mapping information between the physical access port and the logic access port is arranged in the communication proxy equipment, and the communication process specifically comprises the following steps:

after the communication agent equipment receives a layer two control message or a layer two tunneling protocol message interacted between the operator equipment and the access equipment;

carrying out conversion processing between the physical access port and the logical access port according to the mapping relation on the information of the physical access port or the logical access port in the received message;

sending the layer two control message or the two-layer tunnel protocol message after the conversion processing

The embodiment of the invention provides a communication agent device, which specifically comprises:

a message receiving unit, configured to receive a message;

a port mapping unit, configured to perform conversion between a physical access port and a logical access port according to a mapping relationship between a predetermined physical access port of an access device and a logical access port adopted by an operator device, on physical access port or logical access port information in a message received by the message receiving unit;

and the message sending unit is used for sending the message converted and processed by the port mapping unit.

The embodiment of the invention provides a system of a communication agent, which comprises access equipment and operator equipment, wherein a physical access port is adopted in the access equipment; the operator equipment adopts the communication between the logic access port and the access equipment; and the system also includes the communication agent device.

It can be seen from the technical solutions provided by the embodiments of the present invention that, by using the embodiments of the present invention, the physical port between the operator equipment and the access equipment can be isolated by the logical port, so that the access equipment is transparent to the operator equipment for operations such as upgrade and maintenance of the physical port, and meanwhile, the potential safety hazard existing in the prior art can be overcome, and the safety of each physical port of the access equipment can be effectively ensured. In addition, since the ISP can manage the managed logical ports by itself, the difference and the sameness of the identification method of the physical line brought by the fact that the ISP rents the line from multiple network operators are shielded; and the logic ports are easy to organize into continuous arrangement, so that the high-level search algorithm can be adopted while the storage efficiency is greatly improved, and the contradiction between the storage efficiency and the search speed is solved. The realization of the embodiment of the invention can effectively improve the expandability, the safety, the maintainability and the storage and search efficiency of the access equipment, and can ensure that each operator equipment can manage the administered logic port by self.

Drawings

FIG. 1 is a schematic diagram of a system based on L2CP in the prior art;

fig. 2 is a schematic diagram of a communication processing procedure according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of an apparatus according to an embodiment of the present invention;

fig. 4 is a first diagram illustrating a DSL system architecture including the apparatus according to an embodiment of the present invention;

fig. 5 is a schematic diagram of a DSL system configuration including the apparatus in an embodiment of the present invention;

fig. 6 is a schematic diagram of a DSL system configuration including the apparatus in an embodiment of the present invention;

fig. 7 is a block diagram of a DSL system including the apparatus according to an embodiment of the present invention;

fig. 8 is a first schematic structural diagram of a PON system including the apparatus according to an embodiment of the present invention;

fig. 9 is a second schematic structural diagram of a PON system including the apparatus according to an embodiment of the present invention;

fig. 10 is a third schematic structural diagram of a PON system including the apparatus according to an embodiment of the present invention;

fig. 11 is a fourth schematic structural diagram of a PON system including the apparatus according to an embodiment of the present invention;

FIG. 12 is a first schematic structural diagram of a wireless access system including the apparatus according to an embodiment of the present invention;

FIG. 13 is a block diagram of a second embodiment of a wireless access system including the apparatus;

FIG. 14 is a block diagram of a wireless access system including the apparatus according to an embodiment of the present invention;

fig. 15 is a fourth structural diagram of a wireless access system including the apparatus according to an embodiment of the present invention.

Detailed Description

In the embodiment of the invention, after receiving the interactive message between the operator equipment and the access equipment, the conversion processing between the physical port and the logic port can be carried out on the physical port or the logic port information in the received message according to the acquired mapping information between the preset physical port and the logic port, so that the physical port between the operator equipment and the access equipment is isolated, the change of the physical port is not influenced on the business process of the operator equipment, and the safety of each physical port of the access equipment can be ensured.

Specifically, in the embodiment of the present invention, at least one physical port partition is set in an access device, where the physical port partition includes at least one physical port, at least one logical port partition is set in a communication proxy device, the logical port partition includes at least one logical port, mapping information between the physical port and the logical port is also set, and a corresponding logical port partition is allocated to each operator device;

fig. 2 shows a processing procedure of a plurality of corresponding operator devices and access devices for implementing communication through a communication agent, that is, each operator device communicates with an access device through a physical port partition corresponding to each operator device, which may specifically include:

(1) in the upstream direction

An intermediate entity (i.e. a communication agent device) such as an L2CP agent receives a message sent by an access device to a service provider (i.e. an SP) device, wherein the message comprises a physical port identifier;

an intermediate entity such as an L2CP proxy and the like acquires mapping information between a preset physical port and a logic port, and converts a physical port identifier in the message into a corresponding logic port identifier according to the mapping relation;

and sending the converted message, wherein the message comprises a logic port identifier.

(2) In the downstream direction

An intermediate entity such as an L2CP agent receives a message sent by operator equipment to access equipment, wherein the message comprises a logic port identifier;

an intermediate entity such as an L2CP proxy and the like acquires mapping information between a preset physical port and a logic port, and converts a logic port identifier in the message into a corresponding physical port identifier according to the mapping relation;

and sending the converted message, wherein the message comprises a physical port identifier.

The intermediate entity may be disposed in other devices, such as an access device or a device between other operator devices and the access device, or may be disposed independently, where if the intermediate entity is disposed in the access device, the communication between the intermediate entity and the access device is completed inside the access device.

In the above embodiment, the message includes a control message and/or a data message, and further, the control message exchanged between the operator device and the access device, or the control message exchanged between the IP edge device connected to the operator device and the access device may be a message based on L2CP, so as to configure and manage the physical port included in the physical port partition.

In this embodiment of the present invention, if the mapping information is not stored in the intermediate entity, the mapping information between the physical port and the logical port may also be configured and stored in advance in the intermediate entity, and specifically, the mapping information may be configured as: each operator respectively determines a unique corresponding logical port partition, one physical port partition in the logical port partition access equipment corresponds to the logical port partition, and the corresponding logical port partition and the corresponding physical port partition comprise a logical port and a physical port which are in one-to-one correspondence; the logical port partition and the physical port partition in the access device have a one-to-one relationship or a many-to-one relationship, if a many-to-one relationship is adopted, the physical port resource of the access device can be saved, the resource utilization rate of the port can be improved, under the many-to-one condition, a plurality of logical port partitions can multiplex the same physical port partition in a time-sharing manner, and other strategies can be adopted to share the same physical port partition.

In the embodiment of the present invention, an implementation structure of the provided communication proxy apparatus is shown in fig. 3, and may specifically include the following units:

(1) message receiving unit

The unit is specifically configured to receive a message exchanged between an operator device and an access device, where the message may be a control message or a data message, and the control message may be a control message based on L2 CP.

(2) Port mapping unit

The unit is specifically configured to acquire mapping information between a predetermined physical port and a predetermined logical port, and perform conversion processing between the physical port and the logical port according to the mapping relationship, with respect to the physical port or the logical port information in the message received by the message receiving unit;

moreover, the port mapping unit may specifically include a logical port partition storage unit and a port mapping unit, wherein,

the logical port partition storage unit is used for acquiring and storing mapping information between a preset physical port and a logical port;

a mapping conversion processing unit, configured to perform conversion processing between a physical port and a logical end on a physical port or logical port information in a received message according to the mapping information stored in the logical port partition storage unit, where the mapping conversion processing unit may specifically be: converting the physical port identifier in the message sent by the access equipment to the operator equipment into a logical port identifier, and converting the logical port identifier in the message sent by the operator equipment to the access equipment into a physical port identifier.

(3) Message sending unit

The unit is used for sending the messages after the conversion processing of the port mapping unit, and comprises the steps of sending the messages containing the logical port identification after the conversion processing to operator equipment, and sending the messages containing the physical port identification after the conversion processing to access equipment.

Based on the above apparatus, an embodiment of the present invention further provides a communication proxy system for implementing communication between multiple operator devices and an access device, where the system may specifically include the access device and the multiple operator devices, where at least one physical port partition is set in the access device, and the physical port partition includes at least one physical port; the plurality of operator devices are communicated with the access device through the physical port partition corresponding to the operator devices in the access device respectively, and the access device is communicated with each operator device through the communication agent device.

Further, in the system, the communication agent apparatus may be provided independently, or may be provided in the access device, or may be provided in an intermediate device between the access device and the operator device.

Further, the system may further include an interworking function unit, i.e., IWF unit, connected between the apparatus and the operator device, which may be specifically configured to transmit information interacted between the apparatus and the operator through a layer two control protocol message.

For the convenience of understanding of the embodiments of the present invention, a specific implementation scheme of applying the embodiments of the present invention to a system is described below with reference to the accompanying drawings, in which only L2C message communication is used as an example for the schematic description in each drawing, and in an actual application process, other messages, for example, various data communication protocol messages, and the like, may also be used between the corresponding access device and the operator device.

DSL system

As shown in fig. 4, a structure applied to a DSL system in the embodiment of the present invention is that a port mapping unit is set in an L2CP Proxy (hierarchical control protocol Proxy), where the port mapping unit specifically includes a logical port partition storage unit and a port mapping functional unit, and the logical port partition storage unit is used to store a logical port partition, for example, to store and record a logical port partition table of the logical port partition; and in a DSL system said physical port is a DSL physical port.

The logical port partition table stored in the logical port partition table takes DSL physical port partitions as indexes, and records a mapping relationship between a logical port and a physical port, where the mapping relationship may be set according to a correspondence relationship between AN ISP and AN. Among them, the DSL physical port partitions governed by the same ISP or AN may be uniformly organized into one or more logical port partition tables, and accessed and managed by the corresponding ISP through AN IWF (interworking function) unit in the form of AN L2C message.

In the port mapping unit, a mapping relationship in which logical port partitions correspond to DSL physical port partitions one to one may be specifically adopted, that is, one logical port partition table corresponds to one DSL physical port partition, and each logical port in the logical port partition table corresponds to each physical port in the DSL physical port partition one to one; wherein,

the DSL physical port identifier corresponding to the DSL physical port may specifically include: at least one of AN actual AN ID (access node identifier), a cabinet (chassis) number, a rack (rack) number, a frame (frame) number, a slot (slot) number, a sub-slot (sub-slot) number, a port (port) number, a VPI (virtual path identifier), a VCI (virtual channel identifier), a VLAN ID (virtual local area network identifier), AN Ethernet Priority (Ethernet Priority), and a differentiated service code point, that is, one or a combination of a plurality of information contained therein;

the logical port is a virtual port controlled or managed by an ISP, and the corresponding logical port identifier may be specifically an arabic number arranged in sequence; or at least one of a virtual AN ID (access node identification), a cabinet (chassis) number, a rack (rack) number, a frame (frame) number, a slot (slot) number, a sub-slot number, a port (port) number, a VPI, a VCI, a VLAN ID, AN Ethernet Priority, and a differentiated service code point; or, the character string may be corresponding; and so on.

Moreover, the mapping relationship between the logical port partition table and the DSL physical port partition may be set by the network management system in a static configuration manner, or may be configured or modified dynamically through control signaling (e.g., L2C message, etc.).

Based on the port mapping unit provided in the L2CP agent, the corresponding communication process includes the port identifier conversion for implementing signaling, messages or packets with port identifiers, which will be described below with reference to several specific application examples to facilitate further understanding of the corresponding layer two control process, and it should be noted that in the practical application process, the port mapping unit is not limited to these examples.

(1) For the L2C messages, the L2C messages of different ISPs can be isolated by VLAN (virtual local area network) or VR (virtual router) and the like;

in the downlink direction, the port mapping unit receives an L2C message from a BNG (broadband gateway) or a BRAS (broadband access server), and queries a logical port partition table corresponding to a corresponding ISP (Internet service provider) according to a logical port identifier carried in the message to obtain a corresponding physical port identifier; then, the logical port identifier in the L2C message is converted into a corresponding physical port identifier, and the forwarding operation is continued;

in the uplink direction, the port mapping unit receives AN L2C message from the AN, and queries a logical port partition table corresponding to the corresponding ISP according to the physical port identifier carried in the message to obtain a corresponding logical port identifier; thereafter, the physical port id in the L2C message is converted into the corresponding logical port id, and the forwarding operation continues.

(2) For DHCP (dynamic host configuration protocol) messages, the DHCP messages of different ISPs can be isolated by VLAN or VR and the like;

in the uplink direction, the port mapping unit receives a DHCP message from the AN, and queries the logical port partition table corresponding to the ISP according to the physical port identifier in the Option of the DHCP message to obtain a corresponding logical port identifier, for example, a Circuit ID (Circuit number) in the Option 82; and then, converting the physical port identifier (such as the Circuit ID in the Option 82) in the DHCP message Option into a corresponding logical port identifier, and continuing the forwarding operation.

Optionally, in the embodiment of the present invention, an address Option in the message may be further set according to an address of an entity that performs the conversion processing, and specifically, in the above process, a giaddr (transit proxy IP address) field in the DHCP message Option may be set according to an IP address of the L2CP proxy, that is, an IP address of the L2CP proxy may be written in the DHCP message, and then the forwarding operation is performed.

(3) For PPPoE (point-to-point protocol over Ethernet) messages, the PPPoE messages of different ISPs can be isolated in a VLAN or VR manner;

in the uplink direction, the port mapping unit receives a PPPoE message with a TAG (TAG) from the AN, and queries a logical port partition table corresponding to a corresponding ISP according to a physical port identifier carried in the TAG of the message to obtain a corresponding logical port identifier, for example, AN accesssloop id (access loop identifier) carried in the TAG; and then, converting a physical port identifier (such as an access loop id in the TAG) in the PPPoE message TAG into a corresponding logical port identifier, and continuing to forward.

In the DSL system, as shown in fig. 5, the L2CP Proxy may be a DSLAM, or, as shown in fig. 6, may also be a BNG (broadband gateway) or a BRAS (broadband access server), in this case, the corresponding port mapping unit, logical port partition storage unit, and IWF unit may be disposed inside the DSLAM or inside the BNG or BRAS.

In addition, for an application scenario where the DSLAM includes a remote DSLAM, as shown in fig. 7, the remote DSLAM divides each DSL physical port into at least one DSL physical port partition, and the port mapping unit, the logical port partition storage unit, and the IWF unit included in the L2CPProxy are disposed inside the local DSLAM, and the local DSLAM communicates with the remote DSLAM.

(II) PON (Passive optical network) system

The embodiments of the present invention may also be applied to a PON system, where the physical ports in the PON system are PON ports, and as shown in fig. 8, each PON port is divided into a plurality of PON port partitions by an SP (e.g., an ISP) in an OLT (optical line terminal) of the PON system, each PON port partition includes at least one PON port, and the ISP directly controls PON ports included in a corresponding PON port partition through an L2CP proxy.

The functions of the port mapping unit and the IWF unit are similar to the corresponding units in the DSL system, except that the definition of the ports is different, and in the PON system, the definition of the ports is as follows:

the PON port identification corresponding to the PON port comprises one or more combinations of actual AN ID, cabinet number, frame number, slot number, sub-slot number, PON interface number, ONU ID number (optical network unit identification), T-CONT (transport container) identification, port number (port-ID), Logical Link Identification (LLID), VLANID, Ethernet priority and Differentiated Service Code Point (DSCP) information;

the logical port identifier corresponding to the logical port is defined as a virtual port controlled or managed by the ISP, and may be specifically an arabic number arranged in sequence; or a combination of one or more of a virtual AN ID, a cabinet number, a chassis number, a frame number, a slot number, a sub-slot number, a PON interface number, AN ONU ID number, a T-CONT identifier, a port number, a logical link identifier, a VLAN ID, AN ethernet priority, and a Differentiated Services Code Point (DSCP); alternatively, it may be a character string; and so on.

In the PON system, as shown in fig. 9, the L2CP Proxy may be located inside an OLT (optical line terminal); alternatively, as shown in fig. 10, it can be placed inside BNG or BRAS.

As shown in fig. 11, in an ONU (optical network unit), the PON port may be divided into a plurality of PON port partitions, and the L2CP Proxy may be provided in the OLT.

In the PON system, the communication process between the access device and each operator using the port mapping unit is similar to the communication process in the DSL system described above, and therefore, the details are not described here.

(III) Wireless Access System

The embodiment of the present invention is also applicable to a wireless access system, such as a WiMAX (worldwide interoperability for microwave access) system, and as shown in fig. 12, the physical interface in the wireless access system is an air interface, each air interface is divided into a plurality of air interface partitions according to an SP (such as an ISP), and the ISP directly controls the air interface included in the corresponding air interface partition through an L2CP proxy.

In a wireless access system, the functions of the port mapping unit and the IWF unit are similar to those of the corresponding units in a DSL system, and the difference is only that the definition of the air interface is as follows:

the air interface identifier corresponding to the air interface comprises one or more combinations of actual AN ID, cabinet number, rack number, frame number, slot number, sub-slot number, RRU (remote radio unit) number, sector number, frequency point number, channel number, SFID (service flow identifier)/CID (connection identifier), VLAN ID, Ethernet priority and service code point distinguishing information;

the logical port identifier corresponding to the logical port is defined as a virtual port controlled or managed by the ISP, and may specifically be an arabic number arranged in sequence; or may be one or a combination of more of virtual AN ID, cabinet number, rack number, frame number, slot number, sub-slot number, RRU number, sector number, frequency point number, channel number, SFID (service flow identifier)/CID (connection identifier), VLAN ID, ethernet priority, and service code point distinguishing information; or, the character string may be corresponding; and so on.

In the wireless access system, as shown in fig. 13, the port mapping unit, the logical port partition storage unit, and the IWF unit included in the L2CP Proxy may be located inside a BS (base station), an AP (access point), or an ASN GW (access service network gateway); alternatively, as shown in fig. 14, the port mapping unit, the logical port partition storage unit, and the IWF unit included in the L2CP Proxy may be disposed inside the BNG or the BRAS.

In addition, in the wireless access system, as shown in fig. 15, the PON port partition may be divided at the BS, and the port mapping unit, the logical port partition storage unit, and the IWF unit included in the L2CP Proxy may be disposed inside the ASN GW.

In addition, the AN in the embodiment of the present invention may also be a hybrid access point, and at this time, the corresponding logical port partition table includes a plurality of logical ports, that is, includes logical ports corresponding to physical ports of various access points, for example, assuming that the AN is a hybrid access point of a DSLAM, AN OLT, and a BS, the corresponding logical port partition table mixes three types of accessed logical ports.

In the wireless access system, the communication process between the access device and each operator is implemented by using the port mapping unit, which is similar to the communication process in the DSL system described above, and therefore, the detailed description is omitted here.

In summary, the implementation of the embodiments of the present invention described above solves the problem of scalability of a system for communication between an access device and an operator, that is, when an access device such as a DSLAM needs to be upgraded or otherwise maintained, even if a physical port changes, the ISP does not need to be reconfigured. Moreover, under the condition that the operation terminal occupies the physical port partition of the access device, the logical port partition corresponding to the physical port partition can be managed by the corresponding ISP, so that each ISP can conveniently manage the managed ports. In addition, in the embodiment of the invention, the isolation of the physical port partition and the logical port partition is realized, so that the locust physical port in the access equipment can be prevented from being directly managed and realized by the ISP, and the potential safety hazard existing under the condition that the physical port of the access equipment is directly controlled by the ISP is overcome.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A communication proxy method includes setting physical access port in access device, and communication between operator device and access device through logical access port, and is characterized by setting mapping information between physical access port and logical access port in communication proxy device, and the communication process includes:

and sending the layer two control message or the layer two tunneling protocol message after the conversion processing.

2. The method of claim 1, wherein the communication agent device and the operator device exchange information via a layer two tunneling protocol.

3. The method of claim 1, wherein the information is exchanged between the communication proxy device and the access device via a layer two control protocol.

4. A communication proxy apparatus, characterized in that the apparatus comprises:

a message receiving unit, configured to receive a message;

5. The apparatus of claim 4, wherein the port mapping unit comprises:

the logical access port partition storage unit is used for acquiring and storing mapping information between a physical access port adopted by a preset access device and a logical access port adopted by an operator network device; and the mapping conversion processing unit is used for carrying out conversion processing between the physical access port and the logic end on the physical access port or the logic access port information in the received message according to the mapping information stored in the logic access port partition storage unit.

6. The apparatus according to claim 4 or 5, wherein the apparatus and the operator device exchange information through a layer two tunneling protocol.

7. The apparatus of claim 4 or 5, wherein the information is exchanged between the apparatus and the access device via a layer two control protocol.

8. A system of communication agent includes access device and operator device, physical access port is adopted in the access device; the operator equipment adopts the communication between the logic access port and the access equipment; characterised in that the system further comprises a communication proxy device according to claim 4 or claim 5.

9. The system of claim 8, further comprising an interworking function unit, connected between the device and the operator equipment, for transmitting information exchanged between the device and the operator equipment through a two-layer tunneling protocol.

10. The system of claim 8, further comprising an interworking function unit coupled between the device and the access device for transmitting information exchanged between the device and the access device via a layer two control protocol.

11. The system of claim 8, wherein said communication agent means is configured to: a broadband gateway BNG, or a broadband access server BRAS, or an access service network gateway ASN GW, or an optical line terminal OLT;

the access device comprises: the digital subscriber line access multiplexer DSLAM, or a base station, or an access point AP, or an ASN GW, or an OLT.